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1)  Condensation heat transfer
凝结传热
1.
Electrohydrodynamic enhancement of condensation heat transfer in a horizontal tube;
电流体力学强化水平管内凝结传热试验研究
2.
Condensation heat transfer models of refrigerant outside horizontal low-finned tubes were surveyed.
综述了水平低翅片管外凝结传热的基本模型,阐述了二氧化碳制冷剂的物性特点,讨论了表面张力与凝液滞留角及二氧化碳管外凝结换热系数的关系,分析了翅片密度、环形翅片管尺寸对翅片效率、滞留角、凝结换热系数以及传热增强比的影响,优化了外翅片管的齿高与齿距,并求得相应的强化传热增强比。
3.
The calculation of condensation heat transfer outside horizontal tubes in refrigerators using mixed refrigerants is discussed.
分析了混合工质制冷机中水平管外凝结传热的计算问题,对守恒方程进行了处理,得出了分析解。
2)  condensation heat transfer coefficient
凝结传热系数
3)  heat transfer and solidification
传热凝固
1.
Under conditions of a slab caster and the working tip structure of SEN used,comprehensive mathematical description and simulation concerning fluid flow of liquid steel,fluctuation of bath surface and heat transfer and solidification of steel were performed.
结合连铸机设备工艺条件和所采用浸入式水口结构进行了结晶器内钢水流动、自由液面以及传热凝固等冶金现象的综合描述和数值分析。
2.
For CSP thin slab caster at Zhujiang Steel,a comprehensive mathematical simulation concerning fluid flow,fluctuation of bath surface,heat transfer and solidification of melt was performed with given SEN and measured heat fluxes.
基于珠钢CSP薄板坯连铸机设备工艺条件和所采用扁平浸入式水口结构,结合铜板测温导出的热流密度分布进行了漏斗形结晶器内钢水流动、自由液面以及传热凝固等冶金现象的综合描述和数值分析。
4)  Solidification and heat transfer
凝固传热
1.
Changeable space FDM for solidification and heat transfer of rectangular billet in continuous casting;
矩形连铸坯凝固传热的变间距有限差分模拟
2.
Numerical simulation of solidification and heat transfer in the mold for the bloom caster in Baotou Iron and Steel Co.;
包钢大方坯连铸机结晶器凝固传热的数值模拟
3.
Research and application of solidification and heat transfer for liquid steel in mould of SPHC;
SPHC连铸结晶器内钢水凝固传热的研究与应用
5)  heat transfer
凝固传热
1.
Numerical Simulation and Control of Heat Transfer in Continuous Casting Process;
连铸凝固传热全过程数值模拟与控制
2.
Based on the mathematical model of heat transfer in slab continuous casting process, the MSC Marc is adopted to simulate the temperature field and solidification of continuous casting process, and the result of simulation is analyzed.
在建立板坯连铸凝固传热数学模型的基础上,采用有限元软件MSCMarc对国内某板坯连铸机的凝固过程进行模拟,并对其仿真结果进行分析。
6)  solidification heat transfer
凝固传热
1.
The mathematic model of solidification heat transfer process in continuous casting strand is useful for quantitatively analyzing heat transfer in continuous casting process,quality control and process control.
连铸坯凝固传热数学模型对定量分析连铸过程中的热量传递、改善连铸坯质量及实现过程级的动态控制有重要意义。
2.
According to the theory of heat transfer and solidification, we study the solidification heat transfer of dynamic casting process in slab continuous casting.
根据凝固传热理论,对板坯连铸动态拉坯过程中凝固传热进行研究,通过选择合适的拉速、比水量、过热度等工艺参数得到均匀稳定的温度分布,从而可以有效地改善铸坯内部质量。
3.
The mathematic model of solidification heat transfer process in continuous casting strand is useful for quantitatively analyzing heat transfer in continuous casting process,quality control and process control.
连铸坯凝固传热数学模型对定量分析连铸过程中的热量传递、改善连铸坯质量及实现过程级的动态控制有重要意义。
补充资料:传热学:凝结换热
凝结换热:
蒸汽在低於其饱和温度的壁面上凝结时的换热过程﹐是具有相变特点的两相流换热。蒸汽凝结时放出汽化潜热而凝成液体。如凝结液能润湿壁面﹐则在壁面上形成一层液膜﹐受重力作用向下流动。液膜表面上蒸汽的凝结﹐通过液膜向壁面传递热量﹐这称为膜状凝结换热。如果凝结液不能润湿壁面﹐则将聚成珠状滚落﹐称为珠状凝结换热。这时蒸汽仍能直接在壁面上凝结﹐热量的传递没有液膜的阻隔﹐换热强度可比膜状凝结高至10倍。但珠状凝结是很难保持的﹐只有金属蒸气的凝结﹑渗入某种有机物(如油酸﹑辛醇等)蒸汽的水蒸汽在金属壁面上的凝结﹑水蒸汽在涂有硅油﹑聚四氟乙烯等壁面上凝结﹐才是珠状凝结。如果水蒸汽中含有不凝结气体﹐则换热会大大减弱﹐所以在凝汽设备中必须将不凝结气体排除。工业设备中常见的水蒸汽或其他蒸汽在金属壁面上的凝结一般都是膜状凝结。蒸汽在竖管外表面上凝结时﹐液膜沿管长不断增厚﹐换热逐渐减弱。对於横管﹐因管径有限﹐液膜不会太厚﹐所以横管的凝结换热係数较竖管为大。蒸汽流动时﹐如方向与液膜的流动方向相同﹐则会使液膜减薄﹐换热增强﹔如方向相反﹐则液膜增厚﹐换热减弱。蒸汽流速较大时会把液膜吹散﹐使换热增强。蒸汽在横管束中凝结时﹐流过各排管子的蒸汽速度是依次减小的﹐同时﹐下面的管子受上面管子滴下的凝结液的影响﹐膜层变得较厚而又有扰动。管束对凝结换热的影响是一个相当复杂的问题﹐尚未研究出普遍适用的规律。
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